Crucial Role of the Intrinsic-Twist-Rate for the Size of an Intrinsically Curved Semiflexible Biopolymer
學年 109
學期 1
出版（發表）日期 2020-09-08
作品名稱 Crucial Role of the Intrinsic-Twist-Rate for the Size of an Intrinsically Curved Semiflexible Biopolymer
作品名稱（其他語言）
著者 Zicong Zhou
單位
出版者
著錄名稱、卷期、頁數 PHYSICAL REVIEW E 102(3), 032405
摘要 We study the effects of the intrinsic curvature (IC), intrinsic twist rate (ITR), anisotropic bending rigidities, sequence disorder, and temperature (T ) on the persistence length (lp) of a two- or three-dimensional semiflexible biopolymer. We develop some general expressions to evaluate exactly these effects. We find that a moderate IC alone reduces lp considerably. Our results indicate that the centerline of the filament keeps as a helix in a rather large range of T when ITR is small. However, a large ITR can counterbalance the effect of IC and the result is insensitive to the twist rigidity. Moreover, a weak randomness in IC and ITR can result in an“overexpanded” state. Meanwhile, when ITR is small, lp is not a monotonic function of T but can have either minimum or maximum at some T , and in the two-dimensional case the maximum is more obvious than that in the three-dimensional case. These results reveal that to obtain a proper size at a finite T for an intrinsically curved semiflexible biopolymer, proper values of bending rigidities and ITR are necessary but a large twist rigidity may be only a by-product. Our findings are instructive in controlling the size of a semiflexible biopolymer in organic synthesis since the mean end-to-end distance and radius of gyration of a long semiflexible biopolymer are proportional to lp.
關鍵字
語言 en
ISSN 2470-0053
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Zicong Zhou
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/119077 )